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प्रश्न
Write the electronic configuration of K and Ne.
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उत्तर
| Element | Electronic configuration |
| K | 2,8,8,1 |
| Ne | 2,8 |
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संबंधित प्रश्न
Fill in the blank:
The formulae of chloride of metal M is MCl2. The metal M belongs to ……………. group.
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- Compare the average atomic mass with atomic mass of B.
- What could the elements A, B and C be?
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Which element has a total of three shells, with four electrons in its valence shell?
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is ______.
Name the element which is in first group and third period.
Fill in the blank in the following statement:
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How does the atomic size vary on going down from top to bottom in a group of the periodic table? Why does it vary this way?
How does the tendency to lose electrons change as we go down in group 1 of the periodic table? Why does it change this way?
Given alongside is a part of the periodic table. As we move vertically downward from Li to fr?
| Li | Be |
| Na | |
| K | |
| Rb | |
| Cs | |
| Fr | |
| rA | Ra |
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atomic structure (electron arrangements) ?
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1. Identify the most electronegative element.
2. Identify the most reactive element of Group I.
3. Identify the element from Period 3 with least atomic size.
4. How many valence electrons are present in Q?
5. Which element from group 2 would have the least ionisation energy?
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7. In the compound between A and H, what type of bond would be formed and give its molecular formula.
Arrange the following as per instruction given in the bracket
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| Li | Be | B | C | O | F | Ne |
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position in the periodic table
Fill in the blank and rewrite the completed statement:
________ group in the periodic table contains elements that are all gases at room temperature.
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Name or state following with reference to the element of the first three periods of the periodic table.
The formula of the hydroxide of the element having electronic configuration 2, 8, 2.
State the following:
The group which contains highly electropositive metals including sodium.
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(Atomic masses C = 12, 0 = 16, Na = 23)
